Molding machine



Oct. 21, 1941. w, F, H smug, 2,26o,161"' MOLDING MACHINE Filed Nov. 8, 1940 2 Sheets-Sheet l Jrrae/VEM Oct. 21 1941. .w, F, H, BRAUN MOLDING MACHINE Filed NOV. 8, 1940 2 Sheets-Sheet 2 Patented Oct. 21, 1941 UNiTfED smres PATENT OFFICE Application November 8, 1940, Serial No 364,835

1 Claim.

The present invention relates to an imp-rovement in molding machines comprising a stator housing which receives sand and a rotary impeller which projects the sand into a mold through an opening in the housing defined at its entrance by a substantially horizontal edge whereby propelling force acting in substantially one direction and from substantially the same point or line located in the circular path of travel of the end portion of the impeller ejects the sand in a substantially straight line trajectory at the end of which it lands more or less promiscuously and in a line generally parallel with the axis of rotation of the rotor, thus limiting the application of the machine to molds no wider than the width of the housing.

One object of the present invention is to change the mode of operation of the machine and to attain the new and useful result of filling molds Wider than the housing and of any width within working conditions.

Other objects of the invention will appear from the following description at the end of which the invention will be claimed.

Generally stated the improvement consists in inclining the edge defining the entrance to the discharge opening with respect to the horizontal, whereby propelling force acting in different directions at points located in advancing relation around the circular path of the end portion of the impeller ejects the sand in a fan shaped trajectory at the end of which it lands in a substantially straight line inclined to the axis of rotation of the rotor thus adapting the machine to filling molds wider than the hous- The invention also comprises the improvement to be presently described and finally claimed.

In the following description reference will be made to the accompanying drawings forming part hereof and in which Figure l is a somewhat diagrammatic view partly in section and partly in perspective illustrating features of the invention.

Figure 2 is a transverse sectional view of the housing and rotor indicating in dotted line several positions of the latter.

Figure 3 is an elevational view partly in section; and

Figure 4 is a top or plan view partly in section on the line 44 of Figure 3.

Referring to the drawings, I is a stator housing which receives sand at 2, and 3 is a rotor arranged concentrically with the housing I and provided with impellers 4 or which two are shown. The impellers 4 project sand into a mold A through an opening 5 in the housing. The edge 6 which defines the entrance to the discharge opening 5 is inclined with respect to the horizontal, Figs. 1 and 3. The edge 6 is shown as extending between the heads of the stator and it is longer than the width of the space between them.

In operation the propelling force of the rotor, or more accurately its impellers 4, acts at points, for example a, b and 0, located in advancing relation around the circular path of the end portions of the impellers and in different directions indicated by the arrows a, b and 0. Thus the sand is ejected in a fan shaped trajectory indicated at e and c, Figure 4, and lands in a substantially straight line inclined to the axis of rotation of the rotor. adapted to fill molds wider than the housing, Figure 4. In fact as indicated in that figure some of the sand falls over the side thus ensuring that the mold be filled in that direction. It may be here remarked that since the trajectory of the sand is fan shaped molds wider than the mold A, shown in Figure 4, may be employed by moving them further away in downward direction from the stator housing I and molds narrower than the mold A, Figure 4, may be filled in the direction indicated by moving them up nearer to the stator housing I.

The distributing head is mounted for oscillation or rocking movement about the knuckle I and for this purpose it is shown as provided with a handle 8. The object of this construction is to fill the mold A in the direction of its depth, Figure 3. In that figure the dotted lines show positions into which the rotor housing is rocked. Referring to that figure, the fan shaped trajectory of the sand is indicated by the arrows f, a and h.

It may be remarked that since the sand lands in a substantially straight line the corners indicated by the arrows f and h are filled.

From this description it follows that the mold is completely filled with sand not only at its center part but all around its edges.

9 indicates a motor for driving the rotor 3 and this it does through a flexible connection I0, Figure 4.

As shown in the drawing the point a is located above the level of an imaginary horizontal line passing through the center of rotation of the rotor 3; thus the fan shaped trajectory is protracted toward the right in Figure 4.

The machine is thuszontal axis and operating to impel a stream of said material downward along the inner cylindrical surface of the housing, a final discharge opening through the cylindrical wall of the housing and disposed in the path of the on-coming stream of material, the bounding wall of the opening terminating in the periphery of the housing and a portion of the bounding wall of the opening being arranged in the path of the on-coming stream of material and inclined to the horizontal whereby the stream is discharged over the inclined portion directly into the air and at the periphery in a fan shaped trajectory.

WILLIAM F. H. BRAUN. 

